He began working on it soon after he became president in eighteen sixty-one.

VOA: special.2010.05.10

You can hear the wood sort of speaks to you while you are working on it."

VOA: standard.2010.07.06

This time,it happened while he was working on a railroad with men who did rough work and looked rough.

VOA: special.2010.08.01

Scientists are also working on other plants that either use less water or use it better, or both.

VOA: special.2009.01.20

Scientists are also working on other plants that either use less water or use it better,or both.

VOA: special.2009.03.23

"You think you've got your own computer all to yourself and you can't tell the difference that you're working on something other than a computer and sharing this other resource and doing it at a much lower cost than having your own PC."

VOA: special.2010.04.12

Treasury Secretary Geithner said the Obama administration will continue working with House and Senate lawmakers on details of the proposal as it moves into final legislative form.

VOA: standard.2009.03.26

On the other side of town, scientists are working on a genetic test they hope will cut the time it takes to diagnose MDR-TB from 70 days to two days.

VOA: standard.2010.07.12